Which component is necessary for a greywater irrigation field?

In a greywater irrigation system, a storage tank is essential because it serves as the initial containment area for collected greywater—wastewater from sinks, showers, and laundry, which is not contaminated by human waste. This storage tank allows for the strategic management and distribution of greywater, regulating its flow to ensure that the irrigation system operates effectively and minimizes the potential for waterlogging or over-saturation in the disposal area.

While mulch, gravel, and a disposal field are related components of a broader greywater irrigation system, they do not serve the foundational function of storing and managing the greywater. Mulch typically helps in moisture retention and controlling weeds in landscape beds, gravel can facilitate drainage in certain installations, and a disposal field serves to disperse the greywater into the ground. However, without an initial storage tank to hold and manage the greywater, these functions cannot be effectively performed. Thus, the storage tank is a critical component in ensuring the safe and efficient use of greywater for irrigation purposes.